Extension center educators, unit educators, and unit assistants in northern, west-central, east-central, and southern Illinois prepare regional reports to provide more localized insight into pest situations and crop conditions in Illinois. The reports will keep you up to date on situations in field and forage crops as they develop throughout the season. The regions have been defined broadly to include the agricultural statistics districts as designated by the Illinois Agricultural Statistics Service, with slight modifications:|
· North (Northwest and Northeast districts, plus Stark and Marshall counties)
· West central (West and West Southwest districts, and Peoria, Woodford, Tazewell, Mason, Menard, and Logan counties from the Central district)
· East central (East and East Southeast districts [except Marion, Clay, Richland, and Lawrence counties], McLean, DeWitt, and Macon counties from the Central district)
· South (Southwest and Southeast districts, and Marion, Clay, Richland, and Lawrence counties from the East Southeast district)
We hope these reports will provide additional benefits for staying current as the season progresses.
Things are fairly quiet except for Japanese Beetle concerns. The corn is pollinating, beans are flowering, and in areas that received some rain a new flush of weeds is growing. Farmers are getting ready for the western corn rootworm trapping season.
Few cornfields north of Interstate 80 have tasseled; however, many will have reached that stage by next week. Even though some areas received rainfall last week, a large portion of northern Illinois is short of topsoil moisture. Wheat harvest is just beginning in most areas. Second harvest of hay is occurring across the area.
Potassium deficiency symptoms have been observed frequently in corn but are usually limited to field borders or compacted areas.
As far as an insect update, several educators report observing increasing populations of Japanese beetles during the past few weeks in soybeans and noncrop areas. Little damage has been observed in soybeans; however, concern has been expressed whether Japanese beetles will migrate to fresh corn silks over the next few weeks. Producers are encouraged to monitor cornfields for silk clipping by Japanese beetles and, of course, by corn rootworm beetles. Gary Bretthauer, Kendall County Extension educator, reported several lodged first-year cornfields. The damage may be from rootworm larvae. However, this has not been confirmed at press time.
High temperatures and wide-ranging rainfall amounts have resulted in variable conditions across the south. Everything from too dry to too wet exists, with a little ideal soil moisture.
Early corn is late R3 and may be dough by next week. Soybeans continue to bloom and pod. Most crops appear to have good plant health and nutrition.
Scattered insect pest problems continue, but there are no widespread situations. Southwestern corn borer moth second flight is currently being monitored.
Typical summer weather has arrived in the region. Warm and dry conditions exist in most of the areas; however, some scattered showers have been reported.
Most cornfields have tasseled and pollinated; yield potential looks good at this time. Some leaf-disease symptoms are starting to appear. Corn leaf aphids can be found in some fields. No other insect problems have been observed.
Most soybean fields are in the reproductive stages. Leaf cupping is evident in some fields. Portions of some fields have been treated for spider mites. There is concern about herbicide-resistant waterhemp.
Double-crop soybeans have emerged well but need rain for better growth.
Grasshoppers can be found in ditches and other grassy areas.